CN109660577B - Information transmission method, communication device, and computer-readable storage medium - Google Patents
Information transmission method, communication device, and computer-readable storage medium Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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Abstract
The embodiment of the invention discloses an information transmission method, communication equipment and a storage medium. The information transmission method applied to the first communication equipment comprises the following steps: receiving a first message which is sent by second communication equipment and carries a first field; when the first field requests to establish a dynamic dictionary, allocating dictionary identification of the dynamic dictionary, wherein the dictionary identification is used for inquiring the dynamic dictionary in communication through different connections; establishing a dynamic dictionary based on the dictionary identification; and sending the dictionary identification to the second communication equipment.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information transmission method, a communication device, and a computer-readable storage medium.
Background
When different network elements of the network transmit information, a data dictionary may be defined for the convenience of encoding and decoding. The data dictionary may be used to describe information such as the data format of the information being transmitted. For example, the data dictionary may indicate description information of different fields in a transmitted data stream or data packet, etc.
In the prior art, data dictionaries are divided into two categories:
the first method comprises the following steps: static dictionaries, usually defined in advance, are a fixed dictionary of data.
And the second method comprises the following steps: dynamic dictionaries, dictionary data that are accumulated step by step during communication, in the prior art, one dynamic dictionary is only applicable to one connection. If one connection is broken, the dictionary data is invalid.
Firstly, a dynamic dictionary which needs to be negotiated is connected for one time and is only used for one-time connection, so that the use efficiency of dictionary data is effective;
secondly, when the next connection needs to use the dynamic dictionary, the negotiation needs to be rewritten, and obviously, the negotiation times of the dynamic operation are large and the negotiation operations are large.
Disclosure of Invention
Embodiments of the present invention are directed to an information transmission method, a communication device, and a computer-readable storage medium, which at least partially solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides an information transmission method, applied to a first communication device, including:
receiving a first message which is sent by second communication equipment and carries a first field;
when the first field requests to establish a dynamic dictionary, allocating dictionary identification of the dynamic dictionary, wherein the dictionary identification is used for inquiring the dynamic dictionary in communication through different connections;
establishing a dynamic dictionary based on the dictionary identification;
and sending the dictionary identification to the second communication equipment.
Optionally, the method further comprises:
querying the established dynamic dictionary when the first field requests to use the established dynamic dictionary;
the query-based dynamic dictionary is in communication with the second communication device.
Optionally, the first message further carries a second field;
the method further comprises the following steps:
destroying the dynamic dictionary at the end of the lifetime of the dynamic dictionary when the second field indicates the lifetime of the dynamic dictionary.
Optionally, the receiving the first message carrying the first field sent by the second communication device includes:
receiving a connection establishment request carrying the first field for establishing connection;
the method further comprises the following steps:
establishing a first connection based on the connection establishment request;
receiving a connection destruction request carrying a third field;
destroying the first connection based on the connection destruction request;
when the third field does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; or destroying the dynamic dictionary when the third field requests to destroy the established dynamic dictionary.
Optionally, the method further comprises:
receiving a second message carrying a fourth field;
and when the fourth field requests to update the lifetime of the dynamic dictionary, updating the lifetime of the corresponding dynamic dictionary.
Optionally, the method further comprises:
receiving a third message carrying a fifth field;
and when the fifth field requests to replace the used dynamic dictionary, switching the used dynamic dictionary from the first dictionary to the second dictionary.
A second aspect of the embodiments of the present invention provides an information transmission method, applied to a second communication device, including:
sending a first message carrying a first field;
and when the first field requests to establish the dynamic dictionary, receiving dictionary identification of the dynamic dictionary sent by the first communication device based on the first message.
Optionally, the first field can also be used to request communication using an established dynamic dictionary.
Optionally, the sending the first message carrying the first field includes:
and sending a first message carrying the first field and a second field at the same time, wherein the second field is used for indicating the lifetime of the corresponding dynamic dictionary.
Optionally, the sending the first message carrying the first field includes:
sending a connection request carrying the first field;
the method further comprises the following steps:
establishing a first connection with a first communication device after sending the first message;
sending a connection destruction request carrying a third field, and destroying the first connection;
when the third field requests to destroy the established dynamic dictionary, locally destroying the dynamic dictionary, wherein the third field is used for requesting the first communication equipment to destroy the dynamic dictionary;
alternatively, the first and second electrodes may be,
when the third dictionary does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; wherein the third field is to request the first communication device to continue storing the dynamic dictionary.
Optionally, the method further comprises:
and sending a second message carrying a fourth field, wherein the fourth field is used for triggering the first communication device to update the lifetime of the corresponding dynamic dictionary when the lifetime of the dynamic dictionary is requested to be updated.
Optionally, the method further comprises:
and sending a third message carrying a fifth field, wherein the fifth field is used for triggering the first communication device to switch the used dynamic dictionary from the first dictionary to the second dictionary when the replacement of the used dynamic dictionary is requested.
In a third aspect, an embodiment of the present invention provides a communication device, where the communication device is a first communication device, and the communication device includes:
the first receiving unit is used for receiving a first message which is sent by the second communication equipment and carries a first field;
the distribution unit is used for distributing dictionary identification of the dynamic dictionary when the first field requests to establish the dynamic dictionary, wherein the dictionary identification is used for inquiring the dynamic dictionary in communication through different connections;
the establishing unit is used for establishing a dynamic dictionary based on the dictionary identification;
in a fourth aspect, an embodiment of the present invention provides a communication device, where the communication device is a second communication device, and the communication device includes:
a second sending unit, configured to send a first message carrying a first field;
and a second receiving unit, configured to receive, when the first field requests to establish a dynamic dictionary, a dictionary identifier of the dynamic dictionary sent by the first communication device based on the first message.
In a fifth aspect, an embodiment of the present invention provides a communication device, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executed by the processor;
and the processor is respectively connected with the transceiver and the memory and is used for realizing one or more of the data transmission methods applied to the first communication equipment or the second communication equipment by executing the computer program.
In a fifth aspect, an embodiment of the present invention is a computer-readable storage medium storing a computer program; the computer program, when executed, enables one or more of the data transmission methods to be applied to the first communication device or the second communication device.
According to the information transmission method, the communication equipment and the computer readable storage medium provided by the embodiment of the invention, when the dynamic dictionary is established, the special dictionary identification is distributed, and the dynamic dictionary is established based on the dictionary identification, so that the establishment and the destruction of the dynamic dictionary are not strongly related to the establishment and the destruction of the connection, and the dynamic dictionary established through the connection after one connection is destroyed can be continuously stored for the communication of the next connection, so that the number of the dynamic dictionaries required to be established can be reduced, and the effective utilization rate of a single dynamic dictionary can be increased.
Drawings
Fig. 1 is a schematic flowchart of a first information transmission method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a second information transmission method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first communication device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second communication device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a connection and data flow provided by an embodiment of the present invention;
fig. 7 is a flowchart illustrating a third information transmission method according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a fourth information transmission method according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a fifth information transmission method according to an embodiment of the present invention;
fig. 10 is a flowchart illustrating a sixth information transmission method according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
As shown in fig. 1, the present embodiment provides an information transmission method, applied to a first communication device, including:
step S110: receiving a first message which is sent by second communication equipment and carries a first field;
step S120: when the first field requests to establish the dynamic dictionary, dictionary identification of the dynamic dictionary is distributed, wherein the dictionary identification is used for inquiring the dynamic dictionary in communication through different connections
Step S130: establishing a dynamic dictionary based on the dictionary identification;
step S140: and sending the dictionary identification to the second communication equipment.
In this embodiment, the first communication device may be a network element device located on a network side, or may be a terminal device.
The network element device may be: and the access network equipment can also be core network equipment. The access network device may include: and forming a base station of an access network, wherein the access network can be a network directly performing information interaction with the terminal. The core network device is a device for constructing a core network, and is connected to an access network, and a typical core network device may include: a mobility management entity or gateway, etc.
The terminal device may include: the mobile phone and other human-mounted terminals can also be vehicle-mounted equipment such as a communication terminal carried by an automobile, and also can be fixed intelligent water meters and other Internet of things terminal equipment.
In this embodiment, the first communication device may be a network element device, or may be a terminal device, and is preferably a network element device. And if the first communication equipment is network element equipment, the second communication equipment is terminal equipment or other network element equipment.
In this embodiment, the first message may be any message that complies with a static dictionary. The first message may be a connection message requesting to establish a connection, or may be an update message requesting to update a connection, or may be a resource allocation message requesting to allocate a communication resource for communication, and in short, is not limited to any message. In other embodiments, the first message may also be a request message for establishing a dynamic dictionary for a dedicated request.
In this embodiment, the first communication device receives a first message, where the first message carries a first field, and the first field may be a dedicated field carrying a request for establishing a dynamic dictionary, or a multiplexed field for processing multiple requests. For example, the first field may include one or more bits; and when the value of each bit in the first field is a first value, the second communication equipment of the first field requests the first communication equipment to establish the dynamic dictionary.
The first communication device assigns a dictionary identification when the first field carries a request to establish a dynamic dictionary. The dictionary identifier may be a serial number and/or a name of a dynamic dictionary, and in short, the dictionary identifier may be information having a unique identification function in a communication network, and may be referred to as a global identifier in the network.
In step S130 in this embodiment, a dynamic dictionary is established based on the dictionary identification. The step S130 may include: dictionary data included in the dynamic dictionary is stored in correspondence with the dictionary identification. Compared with the method that the dynamic dictionary is identified by using the connection identifier, if the dynamic dictionary needs to be synchronously destroyed when the connection is destroyed, the connection and the dynamic dictionary are bound in the embodiment, so that the destruction of one connection does not necessarily cause the destruction of the corresponding dynamic dictionary, and the dynamic dictionary established in one connection can be used for the communication of the next connection.
In this embodiment, since the dynamic dictionary is assigned with dictionary identifiers, the first communication device may further return the dictionary identifiers to the second communication device in order to facilitate the second communication device to use the dynamic dictionary.
In a specific implementation, the dynamic dictionary may be determined based on a negotiation mechanism by both communication parties (i.e., the first communication device and the second communication device), and in this case, both the first communication device and the second communication device correspond to the dictionary identifier when storing and/or updating dictionary data of the dynamic dictionary.
In short, in the embodiment of the present invention, when the dynamic dictionary is established, the dictionary identifier independent of the connection is specially allocated to the established dynamic dictionary, so that the destruction of the connection (i.e., disconnection) does not result in the destruction of the negotiated dynamic dictionary, and thus the dynamic dictionary can be continuously saved for the next connection and communication, thereby reducing the number of the established dynamic dictionaries, increasing the frequency of using a single dynamic dictionary, and improving the effective use efficiency of the dynamic dictionary.
The method further comprises the following steps:
querying the established dynamic dictionary when the first field requests to use the established dynamic dictionary;
the query-based dynamic dictionary is in communication with the second communication device.
In some embodiments, both or multiple parties of communication know a currently established dynamic dictionary between the first communication device and the second communication device, which can be recognized and used by both parties, according to the locally stored dictionary identification. Therefore, in this case, the dynamic dictionary is not newly created, but the previous dynamic dictionary can be reused. Therefore, in this embodiment, the first field may also be used to carry a request for using the dynamic dictionary and/or a dictionary identifier indicating the used dynamic dictionary.
Therefore, in this embodiment, if the value of the second field is a second value, which is different from the first value, the first communication device, after receiving the second value, considers that the connection is used for communication based on the established dynamic dictionary. In this embodiment, if only one dynamic dictionary is established between the first communication device and the second communication device, the first field may not carry a dictionary identifier of the corresponding dynamic dictionary. In still other embodiments, the first field may be considered to communicate based on a default dynamic dictionary when it does not carry an identification of the dynamic dictionary. The default dynamic dictionary may be specified by pre-negotiation, or determined based on a predetermined rule between the two parties, for example, a dynamic dictionary with the highest frequency of use is selected as the default dynamic dictionary.
In some further embodiments, the first field may only carry a dictionary identifier of the dynamic dictionary requested to be used when the first field is used for requesting to use the established dynamic dictionary, and then, when the dynamic dictionary is queried, the corresponding dynamic dictionary may be queried based on the carried dictionary identifier.
In still other embodiments, the first field may include two subfields, a first subfield and a second subfield, simultaneously; the first subfield is used for distinguishing a creation request and a use request; when the first sub-field carries a use request, the second sub-field is used for carrying dictionary identification of a dynamic dictionary needing to be queried.
In this embodiment, for example, the dynamic dictionary a is established by both communication parties in the communication process established by using the nth connection, and because the dynamic dictionary a has its own unique dictionary identifier, after the nth connection is disconnected, when the communication is performed through the (n + m) th connection, if the dynamic dictionary a is not destroyed, the communication may be performed based on using the dynamic dictionary a.
For example, the dynamic dictionary a determines the format of a data packet communicated through the (n + m) -th connection, parameters corresponding to each field carried in the data packet, and the like. N and m are both positive integers, for example, m takes on a value of 1, 2 or other values.
In short, in this embodiment, the first field may be a field having different functions for the same message, so as to reduce the number of fields exchanged between the first communication device and the second communication device, and reduce the setting of unnecessary dedicated messages.
In some embodiments, the first message further carries a second field; the method further comprises the following steps:
destroying the dynamic dictionary at the end of the lifetime of the dynamic dictionary when the second field indicates the lifetime of the dynamic dictionary.
In this embodiment, the first message further carries a second field. The second field may be used to indicate the lifetime of the dynamic field requesting establishment. When the second field is empty, the currently established dynamic dictionary may be considered as not having a lifetime set, and a destruction time point of the dynamic dictionary may be indicated by a special message. And when the second field is not empty, the second field is used for indicating the lifetime of the dynamic dictionary requested to be established. In this way, the first communication device destroys the dynamic dictionary at the end of the lifetime. Destroying the dynamic dictionary may be deleting the dynamic dictionary stored locally or remotely by the first communication device.
In some embodiments, if the first field requests to query the established dynamic dictionary and the second field is not empty, the time corresponding to the second field is the minimum survival time of the dynamic dictionary expected by the second communication device. For example, when the dynamic dictionary A is built before, the lifetime of the dynamic dictionary A is set to be 03 minutes and finished at 5 pm today; if the current first message is a request message for requesting to establish a connection, the communication of the connection is expected to be ended at least by 6 points, and the dynamic dictionary a can be used for the communication of the connection. Therefore, at this time, the second field may carry time information, which may be used for the second communication device to inform the first communication device, and the lifetime of the dynamic dictionary is delayed to at least the time pointed by the carried time information. In some further embodiments, the time point pointed by the time information carried by the second dictionary is later than the end time point of the lifetime of the dynamic dictionary, and the lifetime of the dynamic dictionary is not extended.
In summary, when the first field is a request field requesting to establish a dynamic dictionary, the second field may be a lifetime indication dictionary indicating the dynamic dictionary requested to be established; when the first field is a request field for requesting to query the established dynamic dictionary, the second field may be a field for requesting to extend the lifetime of the dynamic dictionary, or it is ensured that the end point of the lifetime of the queried dynamic dictionary is equal to or later than the time point pointed by the time information carried by the second field.
In some embodiments, the step S110 may include: receiving a connection establishment request carrying the first field for establishing connection;
the method further comprises the following steps:
establishing a first connection based on the connection establishment request;
receiving a connection destruction request carrying a third field;
destroying the first connection based on the connection destruction request;
when the third field does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary.
In this embodiment, the first message may be a connection request, which will request that a connection be established between the first communication device and the second communication device, for example, a connection is established using a three-way handshake, for example, a request to establish a Transmission Control Protocol (TCP) or the like.
In the embodiment, the first field is set in the connection request, so that the establishment request and the use request of the dynamic dictionary can be sent, and the method has the characteristics of simplicity in implementation and strong compatibility with the prior art.
After the connection is established, after the specific communication is completed, disconnection or destruction of the connection is requested, and in this embodiment, the first communication device also receives a destruction request. A third field is added in the destruction request, and different values of the third field can request the first communication device to destroy the dynamic dictionary established in the connection and/or continuously store the currently established dynamic dictionary.
Therefore, when the third field does not request to destroy the established dynamic dictionary, the dynamic dictionary is continuously stored; destroying the dynamic dictionary when the third field requests to destroy the established dynamic dictionary.
In this way, if the third field is a value a, the first communication device continues to store the dynamic dictionary while destroying the connection, and if the third field is a value B, the first communication device destroys the dynamic dictionary while destroying the connection. The value A and the value B are different. The third field may include 1 or more bits; if any of these bits is different, the values can be considered to be different. In this embodiment, the value a and the value B may be different preset values.
In some embodiments, the method further comprises:
receiving a second message carrying a fourth field;
and when the fourth field requests to update the lifetime of the dynamic dictionary, updating the lifetime of the corresponding dynamic dictionary.
If the first message is a connection request, in this embodiment, the second message may be a message transmitted in a data transmission process by using an established connection after the connection is established. The second message may be a data request message, where the data request message is a message requesting specific data, and in this embodiment, the fourth field may be carried in the data request message. The fourth field may be a lifetime dedicated to updating the certain established dynamic dictionary.
The fourth field may include: a subfield indicating the lifetime and/or an identification subfield indicating the dictionary identification of the dynamic dictionary that needs to be updated for the lifetime.
In some embodiments, the method further comprises:
receiving a third message carrying a use update request of the dynamic dictionary;
receiving a third message carrying a fifth field;
and when the fifth field requests to replace the used dynamic dictionary, switching the used dynamic dictionary from the first dictionary to the second dictionary.
The third message here may also be a data request message. In this embodiment, the fifth field may include: an identification subfield carrying the dictionary identification of the replaced dynamic dictionary, and/or a replacement subfield indicating the replacement.
In this way, the first communication device and the second communication device are allowed to switch the dynamic dictionary used in the communication based on the connection according to the change or transmission requirement of the current service in the communication process.
For example, the first dictionary and the second dictionary are both dynamic dictionaries, but are different dynamic dictionaries.
As shown in fig. 2, the present embodiment provides an information transmission method, applied to a second communication device, including:
step S210: sending a first message carrying a first field;
step S220: and when the first field requests to establish the dynamic dictionary, receiving dictionary identification of the dynamic dictionary sent by the first communication device based on the first message.
In this embodiment, the second communication device is an opposite device of the first communication device in the foregoing embodiment.
The method may be used to request the first communications device to establish the dynamic dictionary by sending a first message carrying a first field. After the first communication device receives the first message, if the first field is a dictionary requesting to establish the dynamic dictionary, dictionary identification is allocated to the dynamic dictionary currently requested to be established. For a description of the dictionary identification, reference may be made to the foregoing embodiments.
In this embodiment, if the dictionary identifier allocated by the first communication device is returned to the second communication device, so that the second communication device locally stores the dictionary identifier, and in a subsequent process of establishing the dynamic dictionary through negotiation with the first communication device, the dynamic dictionary is established based on the dictionary identifier, which at least includes: and storing dictionary data of the dynamic dictionary corresponding to the dictionary identification.
Optionally, the first field can also be used to request communication using an established dynamic dictionary.
The first field may be a composite field, and when the values of the composite field are different, the indicated messages are different, for example, when the first field is the first value, the dynamic dictionary is requested to be established; and when the first field is the second value, requesting to use the established dynamic dictionary.
Optionally, the step S210 may include:
and sending a first message carrying the first field and a second field at the same time, wherein the second field is used for indicating the lifetime of the corresponding dynamic dictionary.
In this embodiment, a first field and a second field exist in the first message at the same time, and the second field may be used to indicate the lifetime of the corresponding dynamic dictionary. If the first field is used for requesting to establish the dynamic dictionary, the second field may be a field for setting the lifetime of the dynamic dictionary requested to be established. If the first field is used for requesting to use the established dynamic dictionary, and the second field is not empty, the second field may be used for ensuring that the end time of the lifetime of the dynamic dictionary requested to be used currently is at least not later than the time pointed by the time information carried by the second field, so as to ensure that the corresponding communication can be completed smoothly.
Optionally, the step S210 may include:
sending a connection request carrying the first field;
the method further comprises the following steps:
establishing a first connection with a first communication device after sending the first message;
sending a connection destruction request carrying a third field, and destroying the first connection;
when the third field requests to destroy the established dynamic dictionary, locally destroying the dynamic dictionary, wherein the third field is used for requesting the first communication equipment to destroy the dynamic dictionary; or when the third dictionary does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; wherein the third field is to request the first communication device to continue storing the dynamic dictionary.
In this embodiment, the first message is a connection request, and in this case, when a connection is established, a field added to the connection request may trigger the first communication device to allocate a dictionary identifier and start dynamic dictionary negotiation.
In addition, in this embodiment, a third field is also set in the destroy request, and a value of the third field may be set according to whether the currently established dynamic dictionary is destroyed. And if the values of the third field are different, the first communication device and the second communication device destroy or continue to store the currently established dynamic dictionary according to the value of the third dictionary.
Optionally, the method further comprises:
and sending a second message carrying a fourth field, wherein the fourth field is used for triggering the first communication device to update the lifetime of the corresponding dynamic dictionary when the lifetime of the dynamic dictionary is requested to be updated.
In this embodiment, the second message may be a message in a data transmission process after the connection is established and before the connection is destroyed. For example, the second message may be a data request message. A fourth field is added to the second message that may be used to update the lifetime of the dynamic dictionary.
Optionally, the method further comprises:
and sending a third message carrying a fifth field, wherein the fifth field is used for triggering the first communication device to switch the used dynamic dictionary from the first dictionary to the second dictionary when the replacement of the used dynamic dictionary is requested.
The third message may also be a message in the data transmission process after the connection is established and before the connection is destroyed, for example, a data request message requesting to transmit data may also be used. And a fifth field is added in the third message, and can be used for triggering the replacement of the used dynamic dictionary according to the communication requirement in the communication process of one connection.
As shown in fig. 3, the present embodiment provides a communication device, where the communication device is a first communication device, and the communication device includes:
a first receiving unit 110, configured to receive a first message carrying a first field sent by a second communication device;
an allocating unit 120, configured to allocate a dictionary identifier of a dynamic dictionary when the first field requests to establish the dynamic dictionary, where the dictionary identifier is used for querying the dynamic dictionary in communications through different connections;
a building unit 130, configured to build a dynamic dictionary based on the dictionary identifier;
a first sending unit 140, configured to send the dictionary identifier to the second communication device.
The first receiving unit 110 and the second sending unit may both correspond to a communication interface, and may be used for data interaction between a first communication device and a second communication device.
The allocating unit 120 and the establishing unit 130 may correspond to a processor; the processor may be a central processing unit, microprocessor, digital signal processor, application processor, programmable array or application specific integrated circuit, or the like. The processor may implement the aforementioned allocation of dictionary identifiers and the establishment of the dynamic dictionary through the operation of a computer program or a software application.
Optionally, the first communication device further comprises:
a query unit, which may correspond to a processor, and which may be configured to query the established dynamic dictionary when the first field requests to use the established dynamic dictionary;
a communication unit, which may correspond to a transceiver such as a communication interface, for communicating with the second communication device based on the queried dynamic dictionary.
Optionally, the first message further carries a second field;
the first communication device, further comprising:
a destroying unit, configured to destroy the dynamic dictionary when the lifetime of the dynamic dictionary is over when the second field indicates the lifetime of the dynamic dictionary.
Optionally, the first receiving unit 110 is further configured to receive a connection establishment request carrying the first field and requesting to establish a connection;
the first communication device further comprises:
a connection unit, which may correspond to a transceiver, a processor, etc., and may be configured to establish a first connection based on the connection establishment request;
the first receiving unit 110 is further configured to receive a connection destruction request carrying a third field;
the connection unit is further configured to destroy the first connection based on the connection destruction request;
the establishing unit 130 is further configured to continue to store the dynamic dictionary when the third field does not request to destroy the established dynamic dictionary; or destroying the dynamic dictionary when the third field requests to destroy the established dynamic dictionary.
Optionally, the first receiving unit 110 is further configured to receive a second message carrying a fourth field; the first communication device further comprises:
and the updating unit corresponds to the processor and is used for updating the lifetime of the corresponding dynamic dictionary when the fourth field requests to update the lifetime of the dynamic dictionary.
Optionally, the first receiving unit 110 is further configured to receive a third message carrying a fifth field;
the first communication device further comprises:
and the switching unit corresponds to the processor and can be used for switching the used dynamic dictionary from the first dictionary to the second dictionary when the fifth field requests to replace the used dynamic dictionary.
As shown in fig. 4, this embodiment provides a communication device, where the communication device is a second communication device, and the communication device includes:
a second sending unit 210, configured to send a first message carrying a first field;
a second receiving unit 220, configured to receive, when the first field requests to establish a dynamic dictionary, a dictionary identifier of the dynamic dictionary sent by the first communication device based on the first message.
The second sending unit 210 and the second receiving unit 220 may correspond to a communication interface of a second communication device, and may be used for information interaction with the first communication device.
Optionally, the first field can also be used to request communication using an established dynamic dictionary. If the second communication device determines to use the established dynamic dictionary to communicate with the first communication device, the first dictionary carries a use request for using the established dynamic dictionary instead of the establishment request for establishing the dynamic dictionary, so that the multiplexing of one dictionary is realized.
Optionally, the second sending unit 210 is specifically configured to send a first message that carries the first field and a second field at the same time, where the second field is used to indicate a lifetime of the corresponding dynamic dictionary.
Optionally, the second sending unit 210 is further configured to send a connection request carrying the first field;
the second communication device further comprises:
a connection unit, configured to establish a first connection with a first communication device after sending the first message;
the second sending unit 210 is further configured to send a connection destruction request carrying a third field, and destroy the first connection;
the second communication device further comprises:
a dictionary processing unit, corresponding to the processor and a memory connected to the processor, configured to locally destroy the established dynamic dictionary when the third field requests to destroy the established dynamic dictionary, where the third field is used to request the first communication device to destroy the dynamic dictionary; or when the third dictionary does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; wherein the third field is to request the first communication device to continue storing the dynamic dictionary.
Optionally, the second sending unit 210 is further configured to send a second message carrying a fourth field, where the fourth field is used to trigger the first communication device to update the lifetime of the corresponding dynamic dictionary when the lifetime of the dynamic dictionary is requested to be updated.
Optionally, the second sending unit 210 is further configured to send a third message carrying a fifth field, where the fifth field is used to trigger the first communication device to switch the used dynamic dictionary from the first dictionary to the second dictionary when the used dynamic dictionary is requested to be changed.
This embodiment provides a communication device, which may be the aforementioned first communication device or second communication device. As shown in fig. 5, the communication device may include: a transceiver 310, a memory 320, a processor 330, and a computer program stored on the memory 320 and executed by the processor 330;
the processor 330 is connected to the transceiver 310 and the memory 320, respectively, and configured to implement, by executing the computer program, the SRS transmission method provided by one or more technical solutions, or implement the data transmission method provided by one or more technical solutions.
The transceiver 310 may be a transceiver antenna in a communication device;
the memory 320 may be a piece of memory 320 including a readable storage medium in the communication device, and may be a random access memory 320, a read only memory 320, a storage hard disk, and the like.
The processor 330, which may be any one or more of the processors 330 described above, may be connected to the transceiver 310 and the memory 320 via an integrated circuit bus (IIC) or the like.
The processor 330 can read the computer program from the memory 320 and execute the computer program, so as to implement the data transmission method applied to the first communication device or execute the data transmission method applied to the second communication device.
The present embodiment also provides a computer-readable storage medium storing a computer program; the computer program, when executed, is capable of performing one or more of the data transmission methods applied in the first communication device or one or more of the data transmission methods applied in the second communication device.
The computer-readable storage medium may be: a mobile storage device, a Read-Only memory (ROM) or y, a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes. Optionally, the computer readable storage medium is preferably a non-transitory readable storage medium, or a non-volatile readable storage medium.
Several alternative application examples are provided below in connection with any of the embodiments described above:
example 1:
it has been clarified by the 3GPP SA2 that a 5G core network employs an SBA (Service Based Architecture) Architecture, and interaction between network elements is performed in a Service invocation mode, that is, a Service Based Interface (SBI) is employed between network elements.
The service interface can be realized by means of hypertext transfer protocol (HTTP) and extensible language (xml) format, HTTP and object markup (JSON) format, etc. Therefore, most operators and manufacturers in the process of selecting the application layer protocol used by the SBI in the 3GPP tend to adopt the HTTP protocol, and since HTTP/2 has obvious technical advantages compared with HTTP/1.1, HTTP/2 will be used as the application layer protocol used by the SBI in the 5G core network. In addition, the IETF is developing a new type of transport layer protocol (Quick UDP Internet Connection, QUIC) to solve the problem of head of line blocking of the TCP protocol.
To further improve communication efficiency, HTTP/2 provides a dictionary-based header compression mechanism (HPACK). The problem to be solved by the present invention arises from the header compression mechanism.
HTTP/2 employs a dictionary-based header compression mechanism that uses a dictionary consisting of two parts, a static dictionary and a dynamic dictionary. The static dictionary is protocol-defined fixed dictionary data, and the dynamic dictionary is dictionary data gradually accumulated by two communication parties in the normal service interaction process. The dynamic dictionary is valid only within one connection context (one TCP connection or one QUIC connection).
As shown in fig. 6, several streams (streams) can be included in one QUIC connection (connection), with stream numbers (stream IDs) distinguishing between different streams, and in fig. 6 one connection can consist of n streams, stream 1, stream 2 through stream n. When a stream is used up and closed, the stream id cannot be used again in the same connection. When all flow labels are used, the connection is closed.
When QUIC is used as a transport layer protocol, each Request (Request) or Response (Response) interaction of HTTP/2 consumes a pair of QUIC streams. When HTTP/2+ QUIC is applied between network elements of a core network, because the frequency and density of signaling interaction between the core network elements are very high, based on the technical principle in the previous chapter, a stream identifier (stream ID) in a QUIC connection established between a pair of network elements will be exhausted quickly, so that the connection must be released and a QUIC connection must be newly established. With the connection released, the dynamic dictionary established by the two parties in the connection will also be invalid, and the dynamic dictionary is accumulated in the new connection again. The transmission efficiency cannot be effectively improved by dictionary compression for the first period of time for a new connection. Based on this, the method can be applied to the data transmission method provided by the embodiment of the invention. Thus, in this example, the lifetime of the dynamic dictionaries maintained by the client (client) and server (server) of the HTTP/2+ QUIC may be decoupled from the lifetime of the QUIC connection, with each dynamic dictionary having a globally unique dictionary identification (ID |). During the process of establishing connection, the two communication parties can:
retraining the dynamic dictionary according to the existing standard mode; alternatively, the negotiation uses a certain dynamic dictionary that has been established before, and the dynamic dictionary is determined by the dictionary ID.
The server can explicitly destroy a certain established dynamic dictionary;
the two communication parties can negotiate the life cycle of the dynamic dictionary, and if the dictionary is not destroyed explicitly after the life cycle expires, the dictionary is destroyed locally and automatically; both communication parties can refresh the dictionary lifetime through signaling.
Example 2:
as shown in fig. 7 and 8, the following header fields are extended in the QUIC protocol:
a Dict-ID field, which can be used for identifying a dynamic dictionary required by the communication;
a Dict-expires field, which may be used to negotiate dictionary lifetime, refresh dictionary lifetime, or display destroy dictionaries.
In the connection establishment process, if the client wishes to create a new dynamic dictionary, all "1" s are carried in Dict-ID. The Server (Server) returns a randomly generated Dict-ID value. The Dict-ID value is the dictionary identification of the dynamic dictionary.
As shown in fig. 7, the Client sends a connection setup request (Client Hello) to the server, where the request carries a Dict-ID field and a Dict-expires field. When the Dict-ID field is 0xFF … F, it indicates that a new dynamic dictionary is requested to be created. After receiving the request, the Server returns a self connection establishment request (Server Hello) to the client, wherein the request carries the Dict-ID field and the Dict-expires field. The Dict-ID field is 0x12 … 3, i.e. the dictionary identifier assigned by the server to the dynamic dictionary. The client and server then build a dynamic dictionary based on the dictionary identification.
As shown in fig. 8, the Client sends a connection setup request (Client Hello) to the server, where the request carries a Dict-ID field and a Dict-expires field. When the Dict-ID field is 0x12 … 3, the communication request indicating the connection uses the dynamic dictionary with dictionary ID 12 … 3 for communication. After receiving the request, the Server returns a self connection establishment request (Server Hello) to the client, wherein the request carries the Dict-ID field and the Dict-expires field. The Dict-ID field is 0x12 … 3, i.e., the server is dynamic.
As shown in fig. 9, the client sends a connection destroy request to the server, where the request carries a Dict-ID field and a Dict-expires field. When the dictionary identifier of the dynamic dictionary destroyed this time is 12 … 3 and the dictionary-expires is 0, which indicates that the lifetime is over, in the Dict-ID field of 0x12 … 3, the server may determine whether to continue storing the dynamic dictionary with dictionary identifier of 12 … 3 according to the Dict-expires. The server destroys the connection upon receiving the request, and both the client and the server destroy the dynamic dictionary identified as 12 … 3.
As shown in fig. 10, the client sends a data request to the server after the connection is established, where the request carries a Dict-ID field and a Dict-expires field. When the Dict-ID field is 0x12 … 3, the dictionary identifier of the dynamic dictionary updated this time is 12 … 3, and the Dict-expires indicates the lifetime of the corresponding dynamic dictionary updated to the duration indicated by Dict-expire. The client and server update the lifetime of the dynamic dictionary, identified as 12 … 3, respectively.
It is worth noting that: in the connection setup process, if the client wishes to use some existing dynamic dictionary, the dictionary ID is carried in the Dict-ID. When closing the connection, the client explicitly destroys the dynamic dictionary by carrying "0" in the Dict-e xpires header field. The Client refreshes the dictionary lifetime by carrying a non "0" value in the Dict-expires header field during sending data. The lifetime of a dynamic dictionary is not dependent on the QUIC connection, and different QUIC connections can use the same dynamic dictionary. And managing the life time of the dynamic dictionary.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned readable storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (16)
1. An information transmission method applied to a first communication device includes:
receiving a first message which is sent by second communication equipment and carries a first field;
when the first field requests to establish the dynamic dictionary, dictionary identification of the dynamic dictionary is distributed, wherein the dictionary identification is information with a unique identification function in a communication network and is used for inquiring the dynamic dictionary in different connected communication;
establishing a dynamic dictionary based on the dictionary identification;
and sending the dictionary identification to the second communication equipment.
2. The method of claim 1,
the method further comprises the following steps:
querying the established dynamic dictionary when the first field requests to use the established dynamic dictionary;
the query-based dynamic dictionary is in communication with the second communication device.
3. The method of claim 1,
the first message also carries a second field;
the method further comprises the following steps:
destroying the dynamic dictionary at the end of the lifetime of the dynamic dictionary when the second field indicates the lifetime of the dynamic dictionary.
4. The method according to any one of claims 1 to 3,
the receiving of the first message carrying the first field sent by the second communication device includes:
receiving a connection establishment request carrying the first field for establishing connection;
the method further comprises the following steps:
establishing a first connection based on the connection establishment request;
receiving a connection destruction request carrying a third field;
destroying the first connection based on the connection destruction request;
when the third field does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; or destroying the dynamic dictionary when the third field requests to destroy the established dynamic dictionary.
5. The method according to any one of claims 1 to 3,
the method further comprises the following steps:
receiving a second message carrying a fourth field;
and when the fourth field requests to update the lifetime of the dynamic dictionary, updating the lifetime of the corresponding dynamic dictionary.
6. The method of claim 5,
the method further comprises the following steps:
receiving a third message carrying a fifth field;
and when the fifth field requests to replace the used dynamic dictionary, switching the used dynamic dictionary from the first dictionary to the second dictionary.
7. An information transmission method applied to a second communication device includes:
sending a first message carrying a first field;
and when the first field requests to establish the dynamic dictionary, receiving dictionary identification of the dynamic dictionary sent by the first communication equipment based on the first message, wherein the dictionary identification is information with a unique identification function in a communication network and is used for inquiring the dynamic dictionary in different connected communication.
8. The method of claim 7,
the first field can also be used to request communication using an established dynamic dictionary.
9. The method according to claim 7 or 8,
the sending the first message carrying the first field includes:
and sending a first message carrying the first field and a second field at the same time, wherein the second field is used for indicating the lifetime of the corresponding dynamic dictionary.
10. The method according to claim 7 or 8,
the sending the first message carrying the first field includes:
sending a connection request carrying the first field;
the method further comprises the following steps:
establishing a first connection with a first communication device after sending the first message;
sending a connection destruction request carrying a third field, and destroying the first connection;
when the third field requests to destroy the established dynamic dictionary, locally destroying the dynamic dictionary, wherein the third field is used for requesting the first communication equipment to destroy the dynamic dictionary;
alternatively, the first and second electrodes may be,
when the third field does not request to destroy the established dynamic dictionary, continuing to store the dynamic dictionary; wherein the third field is to request the first communication device to continue storing the dynamic dictionary.
11. The method according to claim 7 or 8,
the method further comprises the following steps:
and sending a second message carrying a fourth field, wherein the fourth field is used for triggering the first communication device to update the lifetime of the corresponding dynamic dictionary when the lifetime of the dynamic dictionary is requested to be updated.
12. The method of claim 11,
the method further comprises the following steps:
and sending a third message carrying a fifth field, wherein the fifth field is used for triggering the first communication device to switch the used dynamic dictionary from the first dictionary to the second dictionary when the replacement of the used dynamic dictionary is requested.
13. A communication device, wherein the communication device is a first communication device, comprising:
the first receiving unit is used for receiving a first message which is sent by the second communication equipment and carries a first field;
the distribution unit is used for distributing dictionary identification of the dynamic dictionary when the first field requests to establish the dynamic dictionary, wherein the dictionary identification is information with unique identification function in a communication network and is used for inquiring the dynamic dictionary in different connected communication;
and the establishing unit is used for establishing a dynamic dictionary based on the dictionary identification.
14. A communication device, wherein the communication device is a second communication device, comprising:
a second sending unit, configured to send a first message carrying a first field;
and a second receiving unit, configured to receive, when the first field requests establishment of a dynamic dictionary, a dictionary identifier of the dynamic dictionary sent by the first communication device based on the first message, where the dictionary identifier is information having a unique identification function in a communication network and is used for querying the dynamic dictionary in communications of different connections.
15. A communication device, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executed by the processor;
the processor, coupled to the transceiver and the memory, respectively, is configured to implement the method provided in any one of claims 1 to 6, or claims 7 to 12, by executing the computer program.
16. A computer-readable storage medium storing a computer program; the computer program, when executed, is capable of implementing the method as provided in any one of claims 1 to 6, or claims 7 to 12.
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| CN104270223B (en) * | 2014-09-10 | 2017-11-21 | 四川九洲电器集团有限责任公司 | A kind of method and device of transmitting message |
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| CN103279509A (en) * | 2013-05-17 | 2013-09-04 | 北京首钢自动化信息技术有限公司 | Fast inquiring method using dynamic inquiring language |
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